Actuators for Active Flow Control
Any active flow control system necessarily includes actuators. The modeling, design, fabrication, and testing of these devices can be complicated, expensive, and time consuming, often requiring numerous design cycles with less than satisfactory results. The purpose of this chapter is to review recent progress in popular actuators for flow control applications. A brief discussion of basic terminology and design specifications is provided first, followed by their specific interplay with potential flow control objectives. There are numerous types of actuators, and time does not allow a comprehensive discussion of all of these. Therefore only the most popular or promising are discussed after beginning with some historical perspective. In addition, a section is included on actuators potentially suitable for high-speed flows. In all cases, we attempt to summarize key advantages and disadvantages of each, along with unresolved research issues. Suggestions for metrics to consider when using actuators in active flow control applications are also provided.
A Descent Into The Maelstrom or Analogue Gravity (Black Holes, Wormholes and White Fountains) in Hydrodynamics
Germain Rousseaux is a Physicist with a strong interest in interdisciplinary studies. He is interested in physical analogies à la Clerk-Maxwell. His main research topics are physical hydrodynamics, relativities (special and general), classical electromagnetism, granular physics and nonlinear physics. He obtained his PhD at ESPCI Paris in 2003. After several post-doctoral positions at the University of Nice and ULB (Belgium), he joined the CNRS in 2007. Germain Rousseaux is currently CNRS Research Director at the Pprime Institute in Poitiers where he is co-leader of the Curiosity team.